Method of cutting stone.



E. A. CHASE.

METHOD OP CUTTING STONE.

APPLICATION FILED APR. 2s, 1910.

Patented May 5, 1914.

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COLUMBIA PLANQGRAPM cu., WASHINGTON. D, c.

E. A. CHASE.

' METHOD 0F CUTTING STONE.

APPLICATION FILED APR. 2s, 1910.

Patented May 5, 1914.

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APPLICATION IILEIQ APR, 28, 1910.

1,095,707. Patented May 5, 1914.

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NTTEB STATES PATENT TTTTQE.

ELROY A. CHASE, 0F WORCESTER, MASSACHUSETTS, ASSIGNOR TO AMERICAN GRANITE SAV] COMPANY, A CORPORATION OF MAINE.

METHOD OE CUTTING STONE.

Specication of Letters Patent.

Patented May 5, 1914.

To @ZZ 0L' 710m, it may concern Be it known that I, ELRoY A. CHASE, a citizen of the United States, residing at lsVorcester, in the county of l.Vorcester and State of Massachusetts, have invented a new and useful Method of Cutting Stone, of which the following is a specification.

rThis invention relates to a new method of cutting stone. The method consists in successively' making a series of directly intersecting curved kerfs in alinement in the stone preferably in rela-tive lower location. The instrumentality preferably used is a series of alined vibrating cutters. Abrasive material is supplied so that it will wedge back and forth under the ends of said cutters gradually down from one kerf to another, and thus gradually out of the slot which is sawed in the stone. The abrasive material is taken after it has been used in this manner and put back into operative position preferably in the first kerf.

Many different forms of apparatus may be devised for practising the invention.

In the drawings, Figure l is a. sectional elevation showing the essential parts of an apparatus arranged to practise the method; Fig. 2 is a sectional view on enlarged scale; and Figs. 3, #i and 5 are diagrammatic views illustrating the way the method is practised.

The apparatus will first be referred to.

In the drawings A designates a series of cutter carrying heads which are mounted en pivots B. The line of pivots is preferably inclined as shown. The upper ends of the cutter heads are connected together by a link C, each cutter being journaled to the link by a pin D.

E designates a power-driven shaft carrying a crank or wrist-plate F which has a wrist-pin G which connects by a. pitman l-I to a pin I carried by the link C. By this arrangement the cutter heads will be vibrated back and forth synchronously on their pivots. Cutters J are secured in the cutter heads. rIhese cutters consist of Hat blades or pieces of steel7 the ends of whichV preferably parallel to line of pivots B. The cutters and stone are arranged so that a relative feed movement may be effected between the same. This can be done by feeding either the cutters or the stone, but it is preferred in most instances to feed the stone. To this end K designates a car or carrier, the wheels of which run on preferably horizontal rails. Anv suitable feeding device as a screw and nut or gearing is arranged t0 move the carriage or car relatively to the cutters. The stone is held on the car and blocks L are preferably arranged on the car as shown in Fig. 2, so that the last cutter can go entirely through the stone. Troughs or partitions M are arranged inthe car between the wheels thereof to direct the emerging abrasive material clear of the car laterally.

In operation the stone is placed on the car and the car moved toward the back of the machine until cutter No. l engages the stone. Then the feed is put on and abrasive material is supplied under this cutter. As the stone moves under blade No. l a curved kerf will be cut therein. The stone then engages cutter No. 2 and a second curved kerf will be cut therein vertically below the kerf made by cutter No. 1. rlhis operation will be repeated with each cutter. In this way the stone will be sawed through vertically, the kerfs thus being made successively through the stone as indicated at the left in Fig. 3.

It will be seen that the curved kerfs or cuts will intersect each other and that when the stone is engagedv by all the cutters that all the various kerfs will be made simultaneously through the stone by the action of the cutters and the feed.

Abrasive material is supplied preferably in the first kerf. This abrasive material will be presented with a peculiar crushing or wedging eect and will work back and forth under the ends of the cutters and gradually down out through thev slot cut in the stone. As the stone progressesunder the cutters the abrasive material will run out sidewise or laterally on the troughs M and will be shoveled or taken and put back in the first kerf. Boards or other devices N are provided so that the abrasive material can be easily applied in the slot.

The abrasive material which is used preferably consists of small hardened steel shot. 

